[lltx] unicode-math + mathtools

[Arno Trautmann]

Philipp Stephani wrote:
> 2011/8/24 Arno Trautmann<Arno.Trautmann at gmx.de>:
>> Hi all,
>>
>> the following document fails because unicode-math overwrites the definition
>> of mathtools:
>>
>> \documentclass{minimal}
>>
>> \usepackage{mathtools}
>> \usepackage{unicode-math}
>> \setmathfont{XITS-math}
>>
>> \begin{document}
>> \[\underbracket{abc}\]
>> \[\underbracket[7pt]{abc}\]
>> \end{document}
>>
>> \underbracket works, but the optional arguments are gone. I tried to use
>> \let to restore the definition of mathtools after loading unicode-math, but
>> did not succeed. Is this fixable or incompatible in principle?
>
> It is unfortunately incompatible in principle.

aaww :(

>Unicode-math uses
> LuaTeX's \Udelimiterunder to place a special stretchable character
> under the expression, while mathtools uses a form of vector graphics.
> Because the shape of the underbracket character is determined by the
> font in the unicode-math case, the options to set the rule thickness
> and bracket height cannot possibly work.
> For me this is a name clash: both definitions are useful, and possibly
> unicode-math should not use the names used by mathtools. Bug is here:
> https://github.com/wspr/unicode-math/issues/215
> You can restore the definition by saying:
>
> \usepackage{mathtools}
> \let\savedunderbracket

Just for completeness, I assume you mean
\let\savedunderbracket\underbracket

> \usepackage{unicode-math}
> ...
> \begin{document}
> % Unicode table is executed at begin document
> \let\underbracket\savedunderbracket
>

cheers
Arno